playground.mojo

struct DemoStruct(CollectionElement, Stringable):
    var member1: Int

    fn __init__(inout self, member1: Int) -> None:
        self.member1 = member1
        print("Called constructor for " + str(self))

    fn __copyinit__(inout self, other: Self) -> None:
        self.member1 = other.member1
        print("Called copy constructor for " + str(self))

    fn __moveinit__(inout self, owned other: Self) -> None:
        self.member1 = other.member1
        print("Called move constructor for " + str(self))

    fn __del__(owned self) -> None:
        print("Calling destructor for " + str(self))

    fn __str__(self) -> String:
        return "DemoStruct(" + str(self.member1) + ")"

    fn display(owned self) -> Self:
        print("Entering display function")
        print(str(self))
        print("Exiting display function")
        return self


fn main() -> None:
    var demo_obj_1 = DemoStruct(42).display().display()
    # __moveinit__ is called twice for the above line